Monitoring and protecting device and system and method of electrical load

Abstract

The invention discloses a monitoring and protecting device, a system and a method of electrical load. The system comprises a magnetic field collecting device and an electrical load monitoring and protecting device. The magnetic field collecting device and the electrical load monitoring and protecting device are communicated in a wireless manner. After the scheme is adopted, an electromagnetic field of a primary side electric transmission line of a special transformer user is measured through the magnetic field collecting device, current value by pre-set magnetic field-current switch calibration coefficient is obtained and is transmitted to the electrical load monitoring and protecting device, electrical load monitoring can be achieved by a manner of comparing the power of the primary side with the power of a secondary side through the electrical load monitoring and protecting device, and therefore defects of complicated installation and low acceptability of users of an existing load monitoring device are solved. In addition, safe protection of electric equipment is achieved by utilizing identity authentication information of the users and an electric lock, and locking and unlocking of the electric lock can be controlled by using unique identity authentication information, and therefore the purpose of the safe protection of the electric equipment is achieved.

Description

technical field [0001] The invention relates to an electric load monitoring protection device, system and method, belonging to the field of electric power. Background technique [0002] In the existing devices and methods for load monitoring by comparing the apparent power of the primary side of the transformer with the apparent power read by the watt-hour meter, it is usually necessary to divide the devices into many models according to the load and voltage level of the transmission line , the design and implementation are more complicated, and the installation method needs to destroy the original transmission line, so the power supply department will inevitably question its practicability and safety. [0003] The metering box is to protect the metering devices such as electric energy meters from being dismantled, replaced, and transformed without permission, to ensure national property and to ensure the accuracy of measurement, and the additional device is locked on the me...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above shortcomings, the present invention provides an electric load monitoring and protection device, which solves the problem of complicated installation and low user acceptance of the existing load monitoring device, and it can give an alarm when the load is abnormal or the equipment is damaged. In addition, the corresponding power load monitoring and protection system and method are also disclosed

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